Taylor Swift gave a couple a night they'll never forget when she had an ultimate meet and greet with them backstage after her concert in Philadelphia.

Mega-fan Katy Harris and her husband Chris Eisenmann eloped outside of the venue in Philadelphia of Taylor's tour on Friday.

Days before the event, Katy shared on her social media account an outline of their wedding plans.

She wrote: "We originally planned a a whole wedding for 12-13-14 ( Taylor's 25th birthday! ) We had reasons why we had to put it off. Meanwhile, I've had a gown hanging in my closet!!"

"And as I was making our homemade outfits for Taylor (as I have done every two years when she comes to town) a joke about wearing my gown to the concert turned into us driving to Philly to get a marriage license and planning a ceremony outside of Lincoln Financial Field right before walking into the concert in our tux and gown!"

The super 'Swiftie' further explained that she’s been “obsessed” with Swift for years, and Eisenmann has been so understanding and supportive that he can now “put most girls to shame” with his ability to repeat the lyrics to all her song.

Harris concluded by saying that she couldn’t imagine a “better or more fitting way for us to celebrate” their wedding.

They were spotted by Taylor's mother, Andrea and she took the happy couple backstage. Dressed still in white, newlywed Katy headed straight inside to be one of Taylor's squad for the night with husband Chris.

Taylor, who is known for treating her most dedicated fans with special gifts, happily posed for photos and even gave them a handwritten note as a souvenir.

Posting the photo to Instagram, Katy captioned it: "Last night was a dream sequence, Instagram, meet my new husband Chris and our new friend Taylor!!!!!! I have no words to express lastnight!! My two dreams came true!!!".

Katy has since updated her Instagram biography to: ‘Born in 1989 | question everything | 6/12/15 In a 24 hour window I married the love of my life and met my hero. If im dreaming dont wake me up.’